This explains the display’s high contrast, extremely wide viewing angle, and ability to display deep black levels.

PowerĪn OLED display, unlike a character LCD display, does not require a backlight because it generates its own light. Because it is a trade-off between pins and speed, the choice is entirely yours. I2C, on the other hand, requires only two pins and can be shared with other I2C peripherals. SPI is faster than I2C in general, but it requires more I/O pins.